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Will the Rich Solar MEGA 100 SLIM work with the EcoFlow RIVER Plus?

Yes, with a catch. Fine in mild weather (23.6V), but on a 20°F (-7°C) morning the open-circuit voltage rises to about 25.8V, above the 25V limit. Cold makes panels push more voltage. Two panels: works, with a catch (2 panels in parallel on Solar input), about 200 W.

Verdict

Works, with a catch

It charges, but read the note. Best option: 1 panel on Solar input.

1 x MEGA 100 SLIM1 panel on Solar input
RIVER PlusSolar input
Expected
100W
Voltage at 20F
25.8V
limit 25 V
Current
5.1A
cap 12 A
  • Fine in mild weather (23.6V), but on a 20°F (-7°C) morning the open-circuit voltage rises to about 25.8V, above the 25V limit. Cold makes panels push more voltage.
Cables to buy
  • Use the solar charging cable that came with the station (MC4 on the panel side).
Rich Solar MEGA 100 SLIM

100 W, open-circuit 23.6 V, short-circuit 5.4 A, working 19.6 V / 5.1 A. Brand page Panel details

EcoFlow RIVER Plus

Solar input Solar input: 10 to 25 V, 200 W max. Brand page Station details

Change the count or temperature

Two panels: every way to wire them

WiringInputVolts at 20FAmpsWattsVerdict
2 panels in parallel on Solar input
Fine in mild weather (23.6V), but on a 20°F (-7°C) morning the open-circuit voltage rises to about 25.8V, above the 25V limit. Cold makes panels push more voltage.
Solar input25.810.2200Works, with a catch
2 panels in series on Solar input
Open-circuit voltage 47.2V is above the station's 25V limit. Going over a station's input voltage limit can damage it.
Solar input51.75.10Don't connect

Quick answers

Will the Rich Solar MEGA 100 SLIM work with the EcoFlow RIVER Plus?

Yes, with a catch. Fine in mild weather (23.6V), but on a 20°F (-7°C) morning the open-circuit voltage rises to about 25.8V, above the 25V limit. Cold makes panels push more voltage. Two panels: works, with a catch (2 panels in parallel on Solar input), about 200 W.

Can I connect two MEGA 100 SLIM panels to the RIVER Plus?

Yes, 2 panels in parallel on Solar input. That gives about 200 W, with one catch: Fine in mild weather (23.6V), but on a 20°F (-7°C) morning the open-circuit voltage rises to about 25.8V, above the 25V limit. Cold makes panels push more voltage..

What cable do I need to connect the MEGA 100 SLIM to the RIVER Plus?

Use the solar charging cable that came with the station (MC4 on the panel side).

Is it safe on a cold morning?

Panel voltage rises in the cold. One MEGA 100 SLIM goes from 23.6 V on its label to about 25.8 V at 20°F and 26.6 V at 0°F. The RIVER Plus accepts up to 25 V on the Solar input.

Where to buy

$130 at the Rich Solar store, Oct 28, 2026
Buy
Out of stock at the EcoFlow store
View at store

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Other panels that work with the RIVER Plus

→Jackery SolarSaga 200 (JS-200E), about 200 W with two
→EcoFlow NextGen 220W Bifacial Portable Solar Panel, about 200 W with two
→EcoFlow 100W Rigid Solar Panel, about 200 W with two
→EcoFlow 100W Flexible Solar Panel, about 200 W with two
→EcoFlow 110W Portable Solar Panel, about 200 W with two

All 33 panels checked against the RIVER Plus

Rules we applied
  • EcoFlow RIVER Plus: solar input 10 to 25 V on the Solar in (Solar input). EcoFlow sets this limit on open-circuit voltage (Voc), so we hold the panels' Voc on your coldest morning to it.
  • Cold raises panel voltage: we add 0.30% per °C below 77F (25°C), a typical figure, since this panel does not publish its own. At 20F one panel's 23.6 V becomes 25.8 V.
  • Current over the 12 A cap is safe: the station takes 12 A and you get fewer watts. We count only the capped watts.
  • Max 200 W on this input.
Assumptions
  • Cold-morning voltage uses 0.30% per °C, typical for crystalline panels. This panel's own value is not published.
  • Expected watts are the best case in full sun. Real-world midday output is usually 60 to 80% of that.
Sources
From the brand's pageMEGA 100 SLIM label values
Checked Oct 28, 2026